Radiator actuating mechanism



y 1931- J. E. E. DEWOITINE 1,807,514

RADIATOR ACTUATING MECHANISM Filed June 13, 1929 J. 2. Dev/affine Patented May 26, 1931 UNITED STAT ATENT OFFICE RADIATOR ACT'UATING MECHANISM Application filed June 13, 1929, Serial No. 370,636, and in France June 29, 1928.

The present invention has for its chief object a mechanism for regulating at will the position of movable radiators, particularly intended for aircrafts and airplanes, such a mechanism including a servo-motor device for acting on the radiators.

This mechanism allows to obtain certain new, useful and important industrial results, which mainly consist in that the pilot has no longer to exert a considerable stress for actuating the radiators, and in that an important reduction of weight is obtained relatively to the hand-actuated devices used heretofore.

The said invention may be carried out according to a great number of constructional forms, which can mainly differ from each other:

By the nature of the servo-motor used, the later may, more especially, be actuated by the main engine, by means of a kinematic connection; or by the vacuum produced by the suction action of the engine; or by the exhaust gases; or by the pressure of the cooling liquid or of the gasoline; finally, and

mainly, by the pressure of the lubricating oil of the engine.

By the nature of the radiators and particularly by the motion they may have: rotation, translation, or combination of these two movements; and by the nature of the fluid to be cooled by the said radiators: water, or oil, for instance.

In the case of a servo-motor working under the pressure of the lubricating oil, the invention includes the arrangement of a threeway obturat-ing member (cock for instance) allowing either to connect the servo-motor with the feeding pipe for oil under pressure; or to isolate the servo-motor; or to connect the latter with the oil tank.

The said obturating member may be carried out in many different forms: plug cocks, sluice or other valves, or the like, without departing from the scope of the invention.

The obturating member may be actuated either directly by hand, by the pilot, or automatically according to the temperature of the fluid flowing through the radiators and, for instance, by means of any thermostatic device. The invention includes consequently, the combination with the mechanism above described, of a thermostatic device for actuating the member which regulates the Working of the servo-motor.

Obviously, the servo-motor may be of any type, and for instance, a single or double acting piston motor, a membrane-motor, a rotating motor of the turbine type, or the like.

The accompanying drawing illustrates, by way of example only, and in a diagrammatical manner, a constructional form of the invention.

In this example, are represented the main following members, the combination of which constitutes an important part of the invention:

A servo-motor 1, constituted by a cylinder 1 pivoted at 1 and having a piston connected, by its rod 1 and the joint 1 with the radiator 2.

4a is the general pipe for delivering to the engine oil drawn in the casing 40 by the pump 46. A pipe 4 branches from the pipe 4a and communciates with the cock 3. 6a is the pipe which connects the orifice 6 of the cock tothe casing or oil tank 40 for permitting the discharge of the cylinder 1 when the pipes 5 and 6a are placed in communication by means of the cock 3.

The operation is as follows:

In the position shown, the oil under pressure is admitted into the servo-motor, the piston of which moves in the direction indi- 'cated by the arrow, in order to retract the radiator in its housing. By rotating the 8 cock in such a position that the servo-motor be isolated, the piston 1, and consequently, the radiator, are immobilized.

When, the pipes 5 and 6, are allowed to communicate, the weight of the radiator acts to move the piston'down, while the oil is forced into the tank.

It is possible to modify the position of the joint 1 relatively to the pivoting axis 2 of M the radiator, in order to obtain a more or less greater sensitiveness of the servo-motor. Further, as already indicated, the cock 3 may be operated, either directly by the pilot, by means, if need be, of a mechanical link-work, or automatically, by a thermostatic device of any suitable type immersed in the fluid flowing through the radiator.

hat 1 claim as my invention, and desire to secure by Letters Patent is 1. In means for displacing on an airplane a pivoted radiator, a piston connected to the radiator and movable in a cylinder, the latter communicating through a pipe with a source of fluid under pressure or vacuum, and a cock on the said pipe for controlling the pressure in the cylinder and for acting on the piston in order to displace the radiator.

2. In means according to claim 1, a piston connected to the radiator and movable in a cylinder, a pipe connecting the said cylinder to the pipe for delivering the lubricating oil of the engine to be cooled, a pipe connecting the first pipe to the oil tank of the engine, a three-Way'cock interposed between the two pip-es, means for operating the said cock to place the cylinder in communication with the oil tank or with the pipe for delivering the oil of the engine or to isolate the said cylinder for immobilizing the radiator.

In testimony whereof I have signed this specification.

JULIEN EUGENE EMILE DEWOITINE. 

